Gates defends memoir

1/12/14 11:33 AM EST

Former Defense Secretary Robert Gates is defending his new memoir, “Duty,” dismissing claims that it unfairly targets the Obama administration.

‘I make very explicit in the book that I agreed with all of the president's decisions on Afghanistan and ones that he made in 2009 and subsequently,” Gates told CBS’s Rita Braver in an interview aired Sunday on CBS's "Sunday Morning" and "Face the Nation." “My one concern was that over the course of 2010 and early 2011, the president began to have his own reservations about whether it would all work. I think that is not an unfair thing to say.”